Improvement in the preparation of archil



UNITED STATES Parana j arm-a,

IMPROVEMENT IN THE PREPARATION OF ARCHIL.

Specification forming part of Letters Patent No. 1 1,194, dated June 27,1854.

To all whom it may concern:

Be it known that I, J ONAS EBERHARDT, in the county of Philadelphia,State of Pennsylvania, have invented a new mode of preparing the extractof archil and of making a clear and bright steam purple, withoutobtaining it by the means of any acid, after printing and steaming thesame, of which the following is a specification.

Hitherto that color has been obtained, after printing and steaming,through the agency of lime-water to render it light and clear, whichprocess becomes unnecessary by my inventi n.

To enable others skilled in the art to make and use my invention, 1 willproceed to describe my process.

It consists in taking the extract of archil and combining it Wiiillfigiven quantity of calcined magnesia, according to the shade I Want toproduce. When these ingredients are well mixed together I can preparethe color at any time for the purpose of printing by thickeningthecompound with an addition of gunrwaterthe greater the quantity ofgum-water the lighter the shade will be.

To produce the darkshadethefollowing proportions are required:thirty-two ounces of extract of archil; four and a half ounces ofcalcined magnesia; thirty-four ounces of gum- Water.

To obtain the light shade the same proportions of extract of archil andcalcined magnesia are used, augmenting the gum-water to seventy ounces.

\Vhen printed, the impression is steamed and washed.

The color may be printed on silk, woolen, or barege.

The above is the Whole of my process.

What I claim as my invention, and desire to secure by Letters Patent,is-- The production of a bright and clear steampurple, without the useof any acid, after it is being printed and steamed, as herein described,using for that purpose the aforesaid method.

JONAS 'EBERHARDT.

lVitnesses:

CHARLES D. FREEMAN, ABEL REESE.

